John p



(No Model-.)

J. P.'SGH ENGK.

SIPEGULUM.

Patented Apr. 12, 1887.

ATTORNEYS.

WITNESSES UNITED STATES.

PATENT OFFICE.

JOHN P. SCHENOK, or MATIEAWAN, NEW YORK.

-SPECULUIVl.

SPECIFICATION forming part of Letters Patent No. 361,087, dated April 12, 1887.

Application filed November 17, 1886. Serial No. 219.156. (No model.) I

To all whom it may concern.-

Be it known that LJOHN P. Sonnnon, of Matteawan, in the county of Dutchess and State of New York, have invented a new and Improved Speculum, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved speculum which is simple and durable in construction, and very effective when used."

The inventio'rnconsists in the construction and arrangement of parts and details and combination of the same, as hereinafter more fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of my improvement in a closed position. Fig. 2 is a similar view of the same, showing it open. Fig. 3 is a front elevation of the same, parts being broken away; and Fig. 4 is a sectional plan view of part of the sameron the line at a: of Fig. 1.

The speculum is provided with the two upright bars A and A, each pivoted on its lower end in a socket, B, formed on the ends of the arm 0, extending angularly from the said sock ets B, and bent so as to form a slot, D. The upper part of each side bar, Aor A, is formed into'the finger a, which extends nearly at right angles from the respective side bar, is bent back again at a suitable distance from the side bar, and fastened with its end by rivet or solder to the respective bar A or A. Each of the latter is provided below the finger a with the inclined part b, which is slightly twisted, and

on which slides the cross-arm E, having near each end an aperture through which passes the respective side arm, A or A. The lower finger, 0, consists of a bent piece of wire fastened with its ends to the crossarm E, and extending in line with the upper fingers, a.

In the middle of the cross-plate E is secured the downwardly-extending rod G, which passes with its lower screw-threaded end through the slot D of the arm 0, and a thumb or wing nut, H, screws on the said lower end of the rod G and against the arm 0.

A bent spring, I, fastened with 1123 ends on the side bars, A and A, has the tendency to press the side bars, A and A, toward each other, thus holding the fingers a ofthe side bars ina closed position until forced apart.

The operation is as follows: The fingers a of the speculum are introduced into certain cavities of the human body when the instrument is in the closed position as shown in Fig. 1. The operator can then open the fingers a of the side bars, A and A, by moving the rod G downwardly, either by pulling or screwing the nut H up onto the arm 0. This downward motion of the rod G causes its cross-arm E to act on the inclined part of the side bars, A A, and forces the latter apart, and at the same time moves the finger c downwardly. The outer part of the fingers a are moved a greater distance apart on account of the cross-pieces acting on the twisted parts I), causinga tilting motion of the arms A and A in the sockets B. The operator can then open the outer end of the finger 0 still farther by moving the lower end of the rod G outwardly, as shown in Fig. 2, so that the cross-arm E is tilted on, the side bars, A and A, and thereby causes a downward movement of the finger c. The fingers a and 0 can be held in any desired position by screwing the nut up against the arm 0. The lower part of the rod G is guided in the slot D, formed by the arm 0. Having thus described my invention, what I claim-as new, and desire to secure by Letters Patent, is-

1. In a speculum, the side bars, A and A, and the finger a, formed on each of the said side arms, in combination with the finger c, placed below the said fingers a, and the crossarm E, sliding on the side bars, A and A, and adapted to tilt on the same, substantially as shown and described.

2. In a speculum, the side bars, A and A, the bent arm 0, supporting in sockets the said side arms,Aand A, and the finger a, formed on each of the said side bars, in combination with the cross-arm E, adapted to slide and tilt on the 'said side bars, A and A, the finger 0, extend- 3. In a speculum, the side bars, A and A, the bent arms 0, supporting in sockets the side bars, A and A, and the finger a, formed on each of the said side bars, A and A, in combination with the cross-arm E, adapted to slide and tilt on an outwardly-flaring portion of the said arms A and A, the finger 0, extending from the said cross-arm E, the rod G, fastened to the said cross-arm, and the nut H, screwing 0n the lower threaded end of the rod G, substantially as shown and described.

4. In a speculum, the side bars, A and A, the bent arm G, supporting in sockets the side arms, A and A, the finger a, formed on each of the said side bars, A and A, and the I 5 bent spring I, pressing on the said side bars.

in combination with the cross-arm E, adapted to slide and tilt on the said side arms, A and A, the finger 0, extending from the said crossarm E, the rod G, fastened on the said cross- 20 arm E, and the nut H, screwing on the lower threaded end of the said rod G, substantially as shown and described.

JOHN P. SCHENGK.

Vitnesses:

THEo. G. Hos'mn, G. SEDGWICK. 

